Arthur Appleyard, one of Yorkshire's finest, comes to the States to work in an Animal Sciences Laboratory where he learns to call pigs swine or hogs, and discovers that some secret ingredient nutrient is working wonders with Series Three, particularly Humphrey. This attracts the attention of a man who sells people and countries, kills, and even kidnaps Humphrey. Humphrey's a corker of a porker and this one's great fun.